iFi Audio Micro iDSD Signature DAC and Headphone Amplifier
Condition Report
Score: 5 / 5 Mint
Visually and mechanically indistinguishable from new.
- ✓ RCA Cable
- ✓ USB 3.0 Cable
- ✓ Manual
- ✓ USB-A to USB-C cable
- ✓ USB-B to USB-A converter
- ✓ Optical Toslink adapter
This unit has been tested, cleaned and packed for its next owner by Reece.
Product Overview & Specifications
The iFi Audio Micro iDSD Signature Edition is a transportable, battery-powered DAC and headphone amplifier housed in an extruded aluminium chassis with a Space Blue finish. Evolving from the micro iDSD series, this model combines a dual-core Burr-Brown digital engine with a high-output headphone stage delivering up to 4100mW of power. Being battery-powered allows it to supply clean DC power free from mains noise and voltage fluctuations, offering 6 to 12 hours of playback time depending on headphone load and power mode.
The digital section features two Burr-Brown DAC chips configured in a custom interleaved layout to reduce the noise floor and improve channel separation. Signal processing is managed by iFi's Global Master Timing (GMT) femtosecond clock and a Gibbs Transient Optimised (GTO) digital filter, with native playback support for PCM up to 768kHz, DSD512, double-speed DXD, and full MQA decoding. The analogue output stage utilises iFi's direct-coupled S-Balanced circuit architecture on both its 6.3mm and 4.4mm Pentaconn headphone jacks, cutting crosstalk and distortion across balanced and single-ended headphones alike.
KEY FEATURES & PROPRIETARY TECHNOLOGIES
- Dual-Core Burr-Brown Native DAC Engine: Interleaved dual-chip configuration produces four differential signal pairs for low noise, clean micro-dynamics, and bit-perfect conversion.
- High-Power Headphone Amplification: Delivers up to 4100mW output power to drive sensitive in-ear monitors through to demanding planar magnetic headphones.
- S-Balanced Circuit Topology: Extends the benefits of balanced drive to both the 4.4mm Pentaconn and standard 6.3mm headphone outputs, halving crosstalk and distortion.
- Adjustable Power Modes & iEMatch: Three selectable gain profiles (Turbo, Normal, Eco) combined with integrated iEMatch allow precise power matching for high-sensitivity IEMs or power-hungry cans.
- Analogue & Digital Sound Tuning: Features switchable PCM/DSD digital filters alongside iFi's XBass+ analogue bass enhancement and 3D+ Holographic soundstage spatialisation.
- Clean Battery Power Supply: Built-in 4800mAh lithium-polymer battery provides ultra-stable DC power, isolating sensitive audio circuits from mains electricity noise.
SPECIFICATIONS
| Specification | Detail |
|---|---|
| Product Category | Transportable Battery-Powered DAC & Headphone Amplifier |
| Brand / Model | iFi Audio Micro iDSD Signature Edition |
| DAC Architecture | Dual-Core Burr-Brown True Native Bit-Perfect Engine |
| Digital Clocks & Processing | GMT Femtosecond Clock with Intelligent Memory Buffer & GTO Filter |
| Supported Formats | PCM (up to 768kHz) | DSD (up to DSD512) | DXD (up to 768kHz) | MQA |
| Digital Inputs | 1x USB 3.0 Type-A OTG (Built-in iPurifier), 1x S/PDIF (3.5mm Coaxial/Optical) |
| Headphone Outputs | 1x 4.4mm Pentaconn Balanced, 1x 6.3mm Single-Ended (both S-Balanced) |
| Analogue Line Output | 1x Stereo RCA Pair (Fixed/Variable) |
| Maximum Headphone Power Output | 4100 mW @ 16 Ω Load (Turbo Mode) |
| Continuous Power Output | Turbo: >1560 mW @ 64 Ω | Normal: >950 mW @ 32 Ω | Eco: >250 mW @ 16 Ω |
| Power Modes | Turbo (10.0V max), Normal (5.5V max), Eco (2.0V max) |
| Line Output Dynamic Range / THD+N | >117 dB(A) | THD+N: <0.003% @ 0dBFS |
| Headphone Output Dynamic Range / THD+N | >115 dB(A) (Eco Mode) | THD+N: <0.008% (500mW/16 Ω) |
| Output Impedance | Headphone: <1 Ω (without iEMatch) | Line Output: <240 Ω |
| Battery Type & Battery Life | 4800 mAh Lithium-Polymer (6 to 12 Hours Runtime) |
| Charging System | USB-C Port (BC v1.2 compliant up to 1500mA) |
| Chassis Finish & Construction | Space Blue Extruded Aluminium Enclosure |
| Dimensions (L x W x H) | 172 x 67 x 27 mm |
| Net Weight | 295 g |
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